Hindustan Petroleum Corporation [HPCL] — payment gateway not working for online cylinder booking payment

Address:

Vimanagar, Pune, Maharashtra, 411014

I tried 8 times since last 2 days, however every time getting error while redirecting to payment page "https://epay.hpcl.co.in/epay/srequest.jsp".

Error: "it is possible that this site uses an unsupported protocol or cipher suite such as rc4 (Link for the details), which is not considered secure."

I tried to book it through call and sms, however hp agency refused to deliver cylinder as they need payment to be done.

But how can i make payment??? If your site is not working.
I'm in office and cannot take off just for filling the cylinder and make payment doorstep.